which engine is this?

my aunt has an eighty nine vette i wanted to know how much horsepower this one has>>>>> also how much horsepower does the eighty seven vette have i forgot which year they changed the engines to the more potent i think it was either in eighty eight or ninety two but im not to sure

the 87 and 89 have 240 to 250 hp. 92 was the first year of the 300 hp LT1. 90 was the 375 zr1

245 hp L-98